1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
//! Page Table Entry Type
const common = @import("../../../common/common.zig");
const paging_flags = common.constants.paging.flags;
pub const Entry = packed struct {
present: bool = false,
writable: bool = false,
user_accessible: bool = false,
write_through: bool = false,
cache_disabled: bool = false,
accessed: bool = false,
dirty: bool = false,
huge_page: bool = false,
global: bool = false,
available_low: u3 = 0,
physical_address: u40 = 0,
available_high: u11 = 0,
no_execute: bool = false,
pub fn is_present(self: Entry) bool {
return self.present;
}
pub fn is_writable(self: Entry) bool {
return self.writable;
}
pub fn is_user(self: Entry) bool {
return self.user_accessible;
}
pub fn is_huge(self: Entry) bool {
return self.huge_page;
}
pub fn get_physical_address(self: Entry) u64 {
return @as(u64, self.physical_address) << 12;
}
pub fn set_physical_address(self: *Entry, address: u64) void {
self.physical_address = @truncate(address >> 12);
}
pub fn clear(self: *Entry) void {
self.* = Entry{};
}
pub fn from_raw(raw: u64) Entry {
return @bitCast(raw);
}
pub fn to_raw(self: Entry) u64 {
return @bitCast(self);
}
};
|
